We bought two of those metal stick in the yard signs. Fliped the "front-to-front" (flush sides together) and attached two small hinges at the top. In hind sight, we would use a short piano hinge (continuous hinge). For heavy wind, we use sand bags or simply bring it in. The sign is on thin luan plywood, painted (latex exterior high gloss house trim paint... cleans up well)) on both side to hold up to weather. We do need to ad another strap across the bottom of the board (like in the middle) for added support. It will be added to the next sign. I have to make all new signs again. We just buy the precut 2X4 luan and trim it in height.

Yes. the frame is nice an heavy. It has blown over several times (and took off down the street.... we get fierce winds in NM). All we did was hinge it together. The pointy feet can be pushed down a little in to the ground (or a lot if its soft enough unlike the hardpack dirt out here), nestles down into rock gravel nicely in dirt parking lots. And even gets a little grab in asphalt. We recycled one side from a former business sign we had made by a sign shop and added another sign frame we picked up at Home Depot. They seem to be identical. Folds up nicely and David tosses it in the back of the Jeep (our support vehicle). Sturdy & lightweight.

My husband built me one out of two pieces of 3'x4' plywood attached to a wooden frame with a bolt and nut arrangement on the two top corners so it teepees when opened up. It's about 40 pounds (!) but I have a drywall carrier like this one: to help me lift it. It works great, holds up in the wind and is easily repainted when it gets worn-looking. It's lasted five years being toted all over the place. Good luck!